Improvement in air repeating-guns



P. GIFFABD.

Air Repeating-Guns.

Patented Feb. 25,1873.

. AM PHOTO 'LIIHUGRAPHIC an N. 1((assamlslrmacgss) ivrrnn STATES PAULGIFFARD, OF PARIS, FRANCE.

IMPROVEMENT IN'AIR REPEATlNG-GUNS.

Specification forming part of Letters Patent No. 136,315, dated February25, 1873,

To all whom it may concern:

Be it known that I, PAUL GlFFARD, of Paris, in the Republic of France,have invented a new and Improved Air Repeating-Gun;

and I do hereby declare the following, when taken in connection with theaccompanying drawing and the letters of reference marked and in Fig. 2the charging-pump detached.

This invention relates to an improvement in arms designed to employcompressed air for the discharge; and it consists, first, in combiningwith the barrel a partially-rotating device, the aXis of rotation beingat right angles to the axis of the barrel, turning upward to receive thecharge, and down to bring the charge into line with the barrel, combinedwith an air-chamber valve and hammer, so that the hammer actuating thesaid valve will open communication to permit air to pass to the rear ofthe-barrel and cause the discharge, second, in combining with the barrelthe airchamber, valve, and hammer of an air-gun, an adjustablestop toregulate the quantity of air which may pass from the chamber to thebarrel.

0 is the barrel; A, the air-chamber, arranged beneath in substantiallythe usual manner for air-guns. The air-chamber may be supplied with airby any convenient device, or as hereinafter described. The barrel andair-chamber are attached to the stock in the usual manner for otherarms. At the rear or breech end of the barrel is arranged a cylindricalbreech-piece, c, turning freely upon an axis at right angles to the axisof the barrel, and provided with a lever, d, by which it may be turnedup to the position denoted in broken lines. This breech-piece has anopening transversely through it and in line with the barrel, and so thatwhen turned down it forms, practically, a part of the barrel or chamberto receive the ball or shot to be thrown, and when thrown up, as denotedin broken lines, this chamber is open at the top, so that the ball orshot may be dropped therein 5 then turned down, the breech is closed,presenting the ball to the barrel in position for discharge. In theframe a passage, k, leads from the air-chamber up to and communicatingwith the barrel. The rear end of the air-chamber is closed by a valve,the spindle p of which extends back through suitable guides, as seen inFig. 1, so that the hammer q, when thrown forward, will strike the saidspindle and force the valve to open so that the compressed air in thecylinder A will pass through the passage k to the barrel, to operate inthe usual manner of airguns. The hammer q is held at the cock by thescrew a; this actuated by the trigger m to discharge the hammer, themain springl imparting to the hammer the required force. The pressure ofthe air upon the valve will close it after the stroke of the hammer,forcing the hammer back, a slight over-motion of the hammer beingallowed for this purpose. To regulate the extent of movement of thevalve, so that a greater or less quantity of air may be admitted to passto the barrel, is desirable andthis I do by a stop, 1, forward of thehammer, adjusted byturning the screw t soa-s to rise up and down andstop the hammer sooner or later, according to the position of the saidstop. The hammer striking the said stop sooner will give aproportionately less movement to the spindle, and opening the valve;and, later, a proportionately greater movement. The airpump, which isarranged within the cylinder, is shown detatched in Fig. 2. a is thecylinder, of considerably less diameter than the air-chamber A, itsupper end 7: provided with a threaded head to secure the said cylinderinto the air-chamber, leaving a space around the pump for the reservoirfor the compressed air. d is the piston-rod c, the piston, operated bythe head g and a valve, b, at the lower end, so that as the piston isforced down air will pass through the piston into the reservoir. f is aspring at the head to retain the pistoih rod in its closed position.

I claim as my invention- 1. In combination with the barrel 0 providedwith the partial] y-rotatin g breech-piece c, the air-cylinder Aconstructed and arranged relatively to the barrel, and the passage k andspindle p by means of which the air within the cylinder is dischargedinto the barrel, substantially as described.

2. In combination with the barrel 0 and air-chamber A and its connectingmechanism, the inclined stop '1" to adjust the stroke of the hammer,substantially as described.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

Witnesses:

ALBERT CAHEN, EUG. LE LAY.

PAUL GIFFARD.

